What has lots of eyes, but can’t see?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

You are given a set of weighing scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other. The 12 marbles appear to be identical. 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more. Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light

What do you see in the image below

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

What has a bottom at the top?

It is always ahead of me yet I can never see it. What is it?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

What can you deduce from the following BrainBat?

CRY
LMKI